1 tia High Driver, 1 High-Mid Driver, 1 Mid Driver, 1 Dynamic Low Driver
Frequency Response
10hz – 20kHz Frequency Response
Sensitivity
107 dB/mW Sensitivity @1kHz
Crossovers
Integrated 4-way Passive Crossover
Impedance
11Ω Impedance
Apex Technology Isolation:
-20dB, -15dB, -10dB
Cable:
Black Premium Cable
0.23 Ohms Total Impedance
7 x 7 x 4 Multi-Twist
Silver Plated OCC Copper Wire
26 AWG
Terminated in 3.5mm
The U4s by 64 Audio introduces a striking color aesthetic, drawing inspiration from blue-dial timepieces and the unique patterns of Muonionalusta meteorite fragments. The shell’s Slate Blue color and faceplate’s illuminant properties create a distinct tone in various lighting conditions.
In terms of sound, the U4s delivers a balanced and engaging audio experience. It offers physically engaging sub-bass without bleeding into the mid-bass, balanced mid frequencies, and a pleasant high-mid band. The inclusion of the tia high-driver and apex technology contributes to an open, airy quality and an extended soundstage, providing a lifelike sonic experience.
Featuring patented technologies such as Tubeless In-Ear Audio (tia), Air Pressure Exchange (Apex), Linear Impedance Design (LID), and an electrical low-pass filter, the U4s aims to reduce distortion and unwanted resonance for a transparent and lifelike sound signature. The inclusion of these technologies at a new price point brings the classic 64 Audio sound signature to a wider audience.
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